Which value of x satisfies both -9x + 4y = 8 and -3x − y = 4 given the same value of y?
1 answer:
Multiply 2nd equaton by 4 and add to first
-9x+4y=8
<u>-12x-4y=16 +</u>
-21x+0y=24
-21x=24
divide both sides by -21
x=-24/21
x=-8/7
C is answer
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35x - 63 + 4x
35x + 4x -63
39x - 63
2y-4=3y-5
-4=y-5
1=y
Answer: y=1
A=1/2bh
b=6
a=36
36=1/2(6)(h)
36=3h
divide both sides by 3
12=h
height=12 inches
answer is D
